Am I missing something here?
80 cu.ft. steel tanks from scuba
Buoyancy Full = -9.0lbs
Buoyancy Empty = -3.0lbs
80 cu.ft. AL tanks from scuba.com
Buoyancy Full = -1.4lbs
Buoyancy Empty = 3.4lbs
This is specific to tanks of similar volume and I fully realize the difference in tank size but the steel tanks have an empty/full differential of 6 pounds whereas the AL tanks have a differential of only 2. Now the difference here is that the AL tanks are 'positively buoyant' and if one weights up for just a slight bit heavy for the dive one should, using breath control, be good to surface without the elevator effect. The steel tanks would certainly be desirable when using a wetsuit as they are still negatively buoyant and the wetsuit would become more positive as one surfaces.
Again, I do not care to do deep dives or to dive in cold water
, which is why I am moving south as soon as I get a personal matter (divorce!) behind me. Diving
without a BCD is not an option. Having some weight on is a plus in the event I should have to get a bit positive. I would rather take a soft weight out of my pocket and leave it on the bottom than have myself down there. The only instance that I can foresee at this time for diving with out a BCD is cleaning
the bottom of your boat. Forgive me but safety
is always a concern in an already dangerous activity.
Another reason the decision was made to liveaboard
is to be able to dive on a whim. By that I mean simply that if all else is in place and I want to go for a dive I put on the gear
and go. Do the dive and be done. To quote some of the Jamaican's I have had the pleasure to associate with, "No pressure, mon!". No pressure to do my 3 dives a day that is the regimen (Hate that word!) of most people.
So, though the tanks were purchased prior to checking out all the variables it is apparent that the purchase
was a good one. Now if I can stretch out another 10-15 years out of this ol' hide maybe, just maybe there will be some relaxation prior to that imminent end.
Fair winds and lots of bubbles!